Question From:
Steve in Buderim, Brisbane Queensland
Nature of problem:
New leaves turned black after spot spraying with EcoPest oil shortly after spraying with Mancozeb
Type of Plant (if known):
Frangipani
Symptoms of Plant Illness (please try NOT to diagnose your problems yourself):
Orange specks on underside of leaves, white powdery substance around base of some leaf stems
Soil Type (e.g. sandy, clay or loam) OR Potting Mix Type:
clay
How often do you water the plant:
weekly
How many hours of sunlight does the plant get each day:
12
How long since you planted it:
Replanted from back yard approx 7 months ago
Have you fertilised? If so, with what and when:
Seasol PowerFeed twice in January
Is the plant indoors or outdoors:
outdoors
Is the plant in a pot or in the ground:
ground
What other treatments have you given the plant:
Mancozeb and Eco pest oil
Upload photo if available:
Other Comments:
Hello Don and thanks for your previous reply. I sprayed this frangipani with mancozeb after seeing orange specks on the underside of leaves. It has done little to remove the specks but affected leaves have rapidly turned yellow and eventually drop off. I also found concentrations of a white powdery substance around the base of some leaves which I sprayed with Eco pest oil. This has assisted in decreasing the white substance. However new leaves in the areas I sprayed with Ecopest oil have withered and turned black.
Answer:
Thanks so much for sending the extra info and the photo Steve – this makes my diagnosis so much more accurate.
Yes it is Frangipani Rust. I don’t know what the white stuff is. The plant is almost certain to recover from this setback, but it is late in the Summer and it may not fully recover until Spring new growth in October. Just leave it alone and wait for nature to take its course. Don
